I suspect that I am being very stupid today, and missing something that
should be obvious. I have a colleague who wants to draw axes in the
interior of the plot region in a Stata graph (as most people do when
displaying the complex or Argand plane with 0+0*i at the centre),
complete with tick marks and labels on whatever side the user chooses.
However, I have been looking through the Stata Version 11 .pdf manuals
and the Stata Version 10 hardcopy manuals, and I cannot find any
reference to this possibility, although there is a lot about putting
axes on the left, right, top or bottom of the graph region, and the
possibility of up to 9 axes (presumably to allow outside and inside
labelled ticks at the left, right, top and bottom).

Is there a way to do this in Stata graphics? I have checked all the axis
options and the added_line_options, but can't seem to find a way.